Letter sheet and envelope



March 19, 1929. KAKALEY 1,706,300

LETTER SHEET AND ENVELOPE Filed April 26, 1924 4 1' :5 n F395 I ii X a;i1 1/ l \a i =1- 5 I j l! INVENTOR WITNESSFj ATTORNEY 5 ratecompartments, one'for first class mail and Patented Mar; 19, 1929. i

UNITED STATES PATENT OFFICE.

JOSEPH KAKALEY, OF HAZLETON, PENNSYLVANIA.

LETTER SHEET. AND ENVELOPE. I

Application filed. April 26,

The object of the invention is the construction of an envelope from asingle blank of paper which may be used as a letter sheet and which,when folded, will constitute two sepastep in the folding of theenvelope.

Figure 3 next step.

Figure 4 is a plan view showing the envelope folded but the sealing flapextended. Figure 5 is a plan view of theenvelope completely folded,lookingto the rear of the structure disclosed in Figure 41.

Figure 6 isa sectional view on an enlarged scale, and approximately onthe line 6-6 of'Figure 5.

As disclosed by my improved envelope is formed from a single sheet ofmaterial, the body of which being provided with transverse score linesto divide the same into a face portion 1, a sealing flap 2, a sheet 3and an end flap 4. The sealing flap 2has its-edges coated'with anadhesive substance. The flap 4: has an extension 5, divided therefrom bya .score line 6. On the face 1, the-body is provided with lateralextensions divided from the face by score lines and providing flaps 7and 8 respectively, each of which having its face adhesively coated.

In forming the blank into an envelope the is a similar view showing theFigure 1 of the drawing,"

1924. Serial No. 709,238.

flap 5 is folded over the rear face of the end 4, and the end 4 is thenfolded on the score line that divides the same from the sheet 3. Thesheet 3 is then folded on its score line- Which divides the samefrom'the face 1 and the flap 5 is adhesively secured on said face. The flap 7is next adhesively secured to the sheet 3. This provides the compartment9 of the envelope. The flap 2 is adhesively connected to the flap 7 andthe sheet 3 to produce the'second compartment 10. When the-device isemployed for contributions or for second class mail, the flap 8 isextended or folded under the fiap 2. When the device Is to beiemployedfor first'class mail or .to

provide two sealed compartments theflap 8 I is adhesively connected tothe sheet 3 before theflap 2 is folded thereover and adhesively vsecured thereto. I

Before being folded into envelope form, the inner face of the bodymay beemployed for writing purposes, i

Having described the invention, I claim 1- An envelope comprising ablank having a body portion, said body portion being dividedbytransverse scoresinto four sections,

guinmed tabs ontheir extremities, onev of the center sections having twoside tabs, the said blank being adapted to be folded on the transverselines of score, the gummed tab of one end being secured to the face ofthe center sectionhaving the side tabs, the said tabs then being foldedover and secured to. the back of the other center section, the remainingend being secured to the same said center section thereby forming aduplex envelope. I

In testimony whereof I aflix my signature 7 JOSEPH KAKALEY.

eaehof the end sections being provided with I i

